CVE-2025-40229

Kernel memory leak via incomplete scheme teardown

Published Dec 4, 2025 · Updated May 11, 2026

Memory leakage in the DAMON core in Linux allows attackers to retain allocated kernel memory through destruction of configured schemes. damon_destroy_scheme() frees entries in the filter list but omits entries in ops_filter, so their allocations remain after the scheme is released. The public record identifies no attacker-controlled path, and the documented user-space DAMON interface requires root permission to configure schemes.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leakage in the DAMON core in Linux allows attackers to retain allocated kernel memory through destruction of configured schemes. damon_destroy_scheme() frees entries in the filter list but omits entries in ops_filter, so their allocations remain after the scheme is released. The public record identifies no attacker-controlled path, and the documented user-space DAMON interface requires root permission to configure schemes.

The record

CVE
CVE-2025-40229
Published
Dec 4, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 4, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.15
  2. Affected versionversion=ab82e57981d0e4cb46d2817e7b65b9d5fdcf3832 <7071537159be845a5c4ed5fb7d3db25aa4bd04a3
  3. Affected versionversion=ab82e57981d0e4cb46d2817e7b65b9d5fdcf3832 <ff8dcf621a4172f4a6d42cbbb25d21659d3ac300

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=ab82e57981d0e4cb46d2817e7b65b9d5fdcf3832 <7071537159be845a5c4ed5fb7d3db25aa4bd04a3; version=ab82e57981d0e4cb46d2817e7b65b9d5fdcf3832 <ff8dcf621a4172f4a6d42cbbb25d21659d3ac300

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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